public class ProblemOne {

    public static void main(String[] args) {
	int count = 0;
	for (int i = 0; i < 1000; i++) {
	    if (i % 3 == 0 || i % 5 == 0) {
		count = count + i;
	    }
	    

	}
	System.out.println(count);

    }
}
